On Sun, Apr 19, 2020 at 3:32 AM Atish Patra <atish.pa...@wdc.com> wrote: > > In RISC-V, M-mode software can reserve physical memory regions > by setting appropriate physical memory protection (PMP) csr. As the > PMP csr are accessible only in M-mode, S-mode U-Boot can not read > this configuration directly. However, M-mode software can pass this > information via reserved-memory node in device tree so that S-mode > software can access this information. > > This patch provides a framework to copy to the reserved-memory node > from one DT to another. This will be used to update the DT used by > U-Boot and the DT passed to the next stage OS. > > Signed-off-by: Atish Patra <atish.pa...@wdc.com> > Reviewed-by: Bin Meng <bmeng...@gmail.com> > --- > arch/riscv/cpu/start.S | 1 + > arch/riscv/include/asm/global_data.h | 1 + > arch/riscv/include/asm/u-boot-riscv.h | 2 + > arch/riscv/lib/Makefile | 1 + > arch/riscv/lib/asm-offsets.c | 1 + > arch/riscv/lib/fdt_fixup.c | 102 ++++++++++++++++++++++++++ > 6 files changed, 108 insertions(+) > create mode 100644 arch/riscv/lib/fdt_fixup.c >
Tested-by: Bin Meng <bmeng...@gmail.com>
